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United States of America

HERNDON, VIRGINIA


Home > North America > United States > Virginia
Elevation: 322 feet     Latitude: 38 57N     Longitude: 077 27W

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DAILY WEATHER AVERAGE - OCTOBER 1
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[ °C ]   °F
Weather ElementAvgAvg HighAvg LowRecord HighRecord Low
Temperature 59.8 °F 71 °F 49.5 °F 82 °F (2002) 41 °F (1999)
Dewpoint 51 °F 56.7 °F 44.5 °F 66 °F (1998) 23 °F (1998)
Humidity 76 % 96.3 % 49.3 % 22 % (1998)
Barometer 30.06 in 30.14 in 29.98 in 30.46 in (2007) 29.55 in (2010)
Wind Speed 5.8 mph 13.1 mph 26.5 mph (1998)
Wind Gust 24.5 mph 34.5 mph (2010)
Precipitation 0.30 in 0.84 in (2011)
Weather ElementAverage
Visibility8.5 mi
Wind DirectionSSW (213.6 °)
Weather ElementTotal
Heating Degree Days6.9 (Base 18.3)
Cooling Degree Days1.9 (Base 18.3)
Growing Degree Days10.3 (Base 10)
Total Years on Record: 20
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WIND DIRECTION BREAKOUT




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